Safety isn't about someone being offended; it's about people being injured. Hearing loss is an injury.
If one had a rifle particularly punishing to those on either side, what reasonable basis could he have for insisting on using it in a lane that increases exposure to injury?
Its a gun range, expect it to be loud. Sorry but complaining that someone's gun is to loud for you to be by is a lousy excuse. I stand by my earlier comment. Expecting the range to accommodate the needs of one at the expense of everyone else is the beginning of the same downward trend our society has taken.